Carburetor Set MXT Standard 12 mm with E-Choke compatible with Peugeot Speedfight 1 2 Hercules Sachs

The MXT standard carburetor with a 12 mm passage is equipped with an electric cold starting device E-Choke and is intended for various scooter and moped applications. It takes care of the external mixture formation and ensures a demand-oriented fuel-air dosing in cold and warm operation. The design is based on series-type intake systems.

Product Features:

• Carburetor with 12 mm passage
• Electric cold starting device E-Choke
• Flanged attachment on the intake manifold
• Factory basic setting close to series production
• For scooters and mopeds with corresponding E-Choke control

The electric cold starting device automatically takes over the cold start enrichment, which supports a reproducible start-up, especially at low temperatures in everyday life. For the carburetor to function properly, the flange dimensions and the connection to the intake side must fit and the E-Choke must be electrically compatible with the existing connector type and vehicle control. Deviations in the intake system or setup will directly affect the mixture formation and may require an adjustment of the main jet.

Technical Details:

• Passage: 12 mm
• Flange hole distance: approx. 35 mm
• Connection width intake manifold: approx. 28 mm
• Cold starting device: electric E-Choke
• Delivery condition: ready to mount pre-assembled

The hole distance on the flange and the connection width on the intake manifold determine whether the carburetor can be installed without air leaks and without tension, which is crucial for stable idle and clean throttle response. The E-Choke must be electrically connected correctly so that the cold start enrichment works in cold operation and reduces again in warm operation. Since the carburetor is designed close to series specifications, the factory existing basic setting forms a basis but may require a main jet adjustment if components on the intake side have changed.

Vehicle and Model Compatibility:

• Hercules vehicles with matching intake manifold
• Peugeot Speedfight 1
• Peugeot Speedfight 2
• Sachs vehicles with a comparable carburetor system

Note: Compatibility requires identical connection dimensions as well as a suitable electric choke control.

Installation and Application Notes:

• Check flange distance and nozzle diameter before installation. Connect the E-Choke electrically correctly. Properly install the fuel line and vacuum connections. After installation, check idle and throttle response. A clean installation and correct electrical connection are prerequisites for reliable cold start and stable engine operation.

If the flange and nozzle do not fit exactly or if connections are leaky, air leaks occur, and the mixture preparation becomes uncontrollable, which typically manifests as poor cold starting, unstable idle, or hiccups. The correctly connected E-Choke directly affects the mixture enrichment and should therefore be checked before the first operation together with the choke control. Checking idle and throttle response after installation shows whether the basic setting fits the vehicle setup or whether a main jet adjustment is necessary.

Note for Checking Before Purchase:

• Before purchase, check the specified connection dimensions as well as the existing E-Choke connector type. Depending on the vehicle setup, an adjustment of the main jet may be necessary.

Quick Info: Carburetor - Installation, Adjustment & Tuning

Installation: Mount the carburetor without tension, check the intake manifold and seals for air leaks, adjust the throttle cable to operate smoothly, and ensure fuel supply (gasoline, oil, and vacuum).

Basic Setting: Mixture screw usually 1.5 - 2.5 turns open, idle screw adjusted for stable idle, always tune the engine warm.

Tuning:

• Main jet = full throttle / high load
• Needle position = partial load & acceleration
• Idle jet = idle & starting (usually does not need to be changed)

Control: Check spark plug appearance

• white = too lean
• black = too rich
• brown = optimal

Important: After changes to the air filter, exhaust, or cylinder, a new carburetor tuning is mandatory.

About the Manufacturer MXT

MXT is the powerful in-house brand of Heavy Tuned and stands for high-quality spare and tuning parts for motorcycles, scooters, and manual mopeds.

As a reliable alternative to OEM parts, MXT offers a wide range of cylinder kits, carburetors, and crankshafts up to variomatic components, fairing parts, and batteries. The products impress with solid workmanship, precise quality, and a strong price-performance ratio.

Ideal for riders looking for durable spare parts and tuning parts for many vehicle models.